Peer Details
Trunk Name: sipme
authname=1777xxxxxx
dtmfmode=rfc2833
fromuser=1777xxxxxx
host=sip.sipme.com.au
insecure=very
secret=<password>
type=peer
username=1777xxxxxx

User Details
User Context: 1777xxxxxx
context=from-trunk
fromuser=1777xxxxxx
secret=<password>type=user

Register String:
1777xxxxxx:<password>@sip.sipme.com.au/1777xxxxxx